condition mean min max ZT0-3 1.43822225 1.41248 1.4639645 ZT4-7 1.9042000000000001 1.9042000000000001 1.9042000000000001 ZT8-11 1.56461 1.56461 1.56461 ZT12-15 0 0 0 ZT16-19 2.2901100000000003 2.2901100000000003 2.2901100000000003 ZT20-23 1.47232 1.47232 1.47232